. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. 198 BACTERIA AND SOIL FERTILITY jurious action of alkalies in a soil may at times be neutralized by a balancing of the soil solution, that is, the addition of a second salt which would offset the effect of the one present in the soil. This is possible to a limited extent. For instance, calcium, mag- nesium, or even iron salts have been added to an alkali soil and their bacterial flora greatly improved. This method, however, is. Fig. 40.—Influence of alkali on growth of crimson clover. Reading from left to
. Bacteria in relation to soil fertility. Soil microbiology; Bacteriology, Agricultural. 198 BACTERIA AND SOIL FERTILITY jurious action of alkalies in a soil may at times be neutralized by a balancing of the soil solution, that is, the addition of a second salt which would offset the effect of the one present in the soil. This is possible to a limited extent. For instance, calcium, mag- nesium, or even iron salts have been added to an alkali soil and their bacterial flora greatly improved. This method, however, is. Fig. 40.—Influence of alkali on growth of crimson clover. Reading from left to right: (i) normal soil, (2) soil leached, (3) leached + 15T manure, (4) soil with 2 per cent sodium chloride, (5) sodium chloride leached out, (6) soil with sodium chloride + 15 tons manure, (7) leached + I5 tons manure, (8) soil with sodium chloride + extract from fertile soil, (9) leached + extract of fertile soil. in the experimental stage and too great reliance must not be placed upon it in actual practice. Removing the Salt.—Several methods have been used with varying degrees of success for the removal of the salts from the soil: (1) By the growing of alkali-resistant plants on the soil. These are harvested and removed. When the plants are pastured from the soil no benefit would result. (2) In limited areas it has been found feasible to scrape up. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Greaves, Joseph Eames, 1880-; Greaves, Ethelyn O. , joint author. New York, D. Van Nostrand Co.
Size: 1842px × 1356px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbacteriologyagricult
